short: When aiming, the character holds the weapon directly in front of his eyes due to the aiming hole.

I know that this function is not in the "super modifier" and is not in the ARC9 settings, but it is in the EFT on the mk 18 mjolnir rifle, but it is done crookedly, let's say, if you remove any auxiliary attachments for aiming on this rifle (mechanical sights or holographic, etc.), then the FOV specified in the ARC9 settings is applied to the weapon.